body {  
	font-family: Arial, sans-serif;  
	text-align: center;  
	margin-top: 50px;  
  }  
	
  #app {  
	display: inline-block;  
	text-align: left;  
	border: 1px solid #ccc;  
	padding: 20px;  
	border-radius: 5px;  
	box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);  
	background-image: url('./imgs/bg.png'); 
	background-size: cover;  
	background-position: center; 
	width: 300px;  
	height: 200px; 
	margin: 0 auto;  
	box-sizing: border-box; 
  }  
	
  h1 {  
	margin-bottom: 20px;  
  }  
	
  button {  
	padding: 10px 20px;  
	font-size: 16px;  
	cursor: pointer;  
  }  
	
  p {  
	margin-top: 10px;  
  }